patch-2.4.22 linux-2.4.22/arch/mips/au1000/common/pci_fixup.c

• Lines: 136
• Date: 2003-08-25 04:44:39.000000000 -0700
• Orig file: linux-2.4.21/arch/mips/au1000/common/pci_fixup.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.21/arch/mips/au1000/common/pci_fixup.c linux-2.4.22/arch/mips/au1000/common/pci_fixup.c
@@ -0,0 +1,135 @@
+/*
+ * BRIEF MODULE DESCRIPTION
+ *	Board specific pci fixups.
+ *
+ * Copyright 2001-2003 MontaVista Software Inc.
+ * Author: MontaVista Software, Inc.
+ *         	ppopov@mvista.com or source@mvista.com
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
+ *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
+ *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
+ *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  You should have received a copy of the  GNU General Public License along
+ *  with this program; if not, write  to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <linux/config.h>
+
+#ifdef CONFIG_PCI
+
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+
+#include <asm/au1000.h>
+//#include <asm/pb1500.h>
+#ifdef CONFIG_MIPS_PB1000
+#include <asm/pb1000.h>
+#endif
+
+#undef	DEBUG
+#ifdef 	DEBUG
+#define	DBG(x...)	printk(x)
+#else
+#define	DBG(x...)
+#endif
+
+static void fixup_resource(int r_num, struct pci_dev *dev) ;
+#ifdef CONFIG_SOC_AU1500
+static unsigned long virt_io_addr;
+#endif
+
+void __init pcibios_fixup_resources(struct pci_dev *dev)
+{
+	/* will need to fixup IO resources */
+}
+
+void __init pcibios_fixup(void)
+{
+#ifdef CONFIG_SOC_AU1500
+	int i;
+	struct pci_dev *dev;
+	
+	virt_io_addr = (unsigned long)ioremap(Au1500_PCI_IO_START, 
+			Au1500_PCI_IO_END - Au1500_PCI_IO_START + 1);
+
+	if (!virt_io_addr) {
+		printk(KERN_ERR "Unable to ioremap pci space\n");
+		return;
+	}
+
+#ifdef CONFIG_NONCOHERENT_IO
+	/* 
+	 *  Set the NC bit in controller for pre-AC silicon
+	 */
+	au_writel( 1<<16 | au_readl(Au1500_PCI_CFG), Au1500_PCI_CFG);
+	printk("Non-coherent PCI accesses enabled\n");
+#endif
+
+	set_io_port_base(virt_io_addr);
+#endif
+
+#ifdef CONFIG_MIPS_PB1000 /* This is truly board specific */
+	unsigned long pci_mem_start = (unsigned long) PCI_MEM_START;
+
+	au_writel(0, PCI_BRIDGE_CONFIG); // set extend byte to 0
+	au_writel(0, SDRAM_MBAR);        // set mbar to 0
+	au_writel(0x2, SDRAM_CMD);       // enable memory accesses
+	au_sync_delay(1);
+
+	// set extend byte to mbar of ext slot
+	au_writel(((pci_mem_start >> 24) & 0xff) |
+	       (1 << 8 | 1 << 9 | 1 << 10 | 1 << 27), PCI_BRIDGE_CONFIG);
+	DBG("Set bridge config to %x\n", au_readl(PCI_BRIDGE_CONFIG));
+#endif
+}
+
+void __init pcibios_fixup_irqs(void)
+{
+#ifdef CONFIG_SOC_AU1500
+	unsigned int slot, func;
+	unsigned char pin;
+	struct pci_dev *dev;
+
+	pci_for_each_dev(dev) {
+		if (dev->bus->number != 0)
+			return;
+
+		dev->irq = 0xff;
+		slot = PCI_SLOT(dev->devfn);
+		switch (slot) {
+			case 12:
+			case 13:
+			default:
+				dev->irq = AU1000_PCI_INTA;
+				break;
+
+		}
+		pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
+		DBG("slot %d irq %d\n", slot, dev->irq);
+	}
+#endif
+}
+unsigned int pcibios_assign_all_busses(void)
+{
+	return 0;
+}
+
+static void fixup_resource(int r_num, struct pci_dev *dev) 
+{
+}
+#endif